JPS6228831Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a combine harvester equipped with an electric motor for adjusting the handling depth, and even with a simple configuration, it is possible to prevent damage to the motor due to an increase in driving load caused by an increase in the amount of grain culm, etc. The purpose is to do so.

Next, an embodiment of the combine harvester of the present invention will be described based on illustrative drawings.

At the front of a self-propelled vehicle equipped with a crawler traveling device 1 and a threshing section 2, a lifting device 3 and a reaping device 4 for planting grain rods, a device section 5 for locking and transporting the ear tip side, and a stock head are installed. Part 6 of the device that holds and conveys the sides
It consists of a feed chain 7 for threshing the harvested grain culm.
A device 8 for conveying to the rear of the aircraft to supply the starting end of the
As the aircraft moves, the planted grain rods are raised and reaped, and the reaped grain rods are threshed.

In order to enable the grain culm holding position in the conveying device 8 to be changed in the direction of the culm, a part of the grain holding and conveying device section 6 is swung up and down around the horizontal axis P by a reversibly rotatable electric motor M. By controlling the drive of the motor M, the handling depth in the threshing section 2 can be changed. As shown in FIG. 2, three devices, a device 9 for detecting the presence or absence of a grain culm in the lifting path in the lifting device 3, and a contact rocking sensor for the lifted grain culm, are arranged in parallel in the culm direction. A device 1 configured to raise and detect the grain culm length based on the detection of the rocking state of these sensors.
0, and a device 11 for detecting the swinging position of the clamping and conveying device portion 6, which becomes operable based on the presence detection result of the grain culm presence/absence detection device 9, and the rod length detection device 10 and the results of the swing position detection device 11, the motor M
Mechanism 1 for automatically controlling the operating mechanism 12 for
3, and in order to keep the handling depth constant, the clamping and conveying device section 6 is automatically controlled to swing based on the detection of the length of the raised grain culm.

As shown in FIG. 3, a current detection device 14 in the power supply circuit for the motor M is provided, and a switch 15 for turning on and off the power supply circuit is provided.
are provided so as to be freely switchable by the operating device 16, and further,
The detected value of the current detection device 14 is detected by the first setting device 17.
a first control mechanism configured to automatically control the switch operating device 16 to the switch-off side when a state in which the value exceeds a preset value occurs for a preset time by the second setting device 18; 19
A safety mechanism 20 is provided to prevent the motor M from being damaged by seizure. That is, for example, the amount of grain culm in the conveying device 8 is large and the sliding resistance between the grain culm and the ear-side locking conveyance portion 5 is large, so that the resistance to drive and oscillate the clamping conveyance device portion 6 increases. When the rotational resistance of the motor M increases, the increased resistance is detected by the resulting increase in current in the motor power supply circuit, and the motor power is turned off. This is designed to prevent the motor from seizing up if the power is left on for a long time.

A device 21 for detecting the on/off state of the switch 15 compares and determines the duration of the switch off detection state with a time preset by a third setting device 22, and determines whether the detection time is the set time. If the switch continues, the switch operating device 16 is automatically controlled to the switch ON side, and the first
The current detection device 14 for the control mechanism 19
A second control mechanism 23 is attached to the safety mechanism 20 and configured to transmit a count to start from zero for the duration of the current detection state exceeding a set value. That is, the power is turned off to prevent seizure of the motor M by turning off the power only for a time corresponding to the grain culm retention in the conveying device 8 being gradually eliminated by the grain culm conveyance of the conveying device 8, and the gripping and conveying device 6 is When the abnormal swing driving load is eliminated, the power circuit is automatically restored to the on state.

An opening/closing switch 25 is provided which is operated by an operating device 24 based on the detection result of the switched off state by the switch state detection device 21, and
This open/close switch 25 is interposed in the power circuit of a buzzer 26 as an example of a notification device, and the buzzer 26 indicates that the safety mechanism 20 is in the off state.
A mechanism 27 is provided which is configured to give an alarm when activated.

A clutch 28 that connects and disconnects the power from the engine E to the traveling device 1 is provided so that it can be operated on and off by an operating device 29, and the clutch operating device 29 is operated based on the result of the switch state detection device 21. A mechanism 30 is provided which is configured to automatically control the clutch operation device 29 to the clutch release side only while the detection device 21 is in the switch release detection state, and is linked to the safety mechanism 20. and a mechanism 31 configured to automatically stop the aircraft only while it is in the off state.
is provided. If the driving resistance of the clamping and conveying device section 6 increases, the grain culm supply to the conveying device 8 is stopped so that the grain culm accumulation in the conveying device 8 can be resolved more quickly.

The drive transmission 32 of the traveling device 1 is provided to be able to be decelerated by an operating device 33, and the detected value of the current detection device 14 is preset by the first control mechanism 19 using a fourth setting device 34. A mechanism 35 is provided which automatically controls the operating device 33 to the deceleration side based on the determination result when it is determined that the current has exceeded the set value, and the current detected value of the power supply circuit is set to the first setting. A mechanism 36 is provided which is configured to automatically decelerate the movement of the aircraft when the set value becomes lower than the set value set by the fourth setter 17, that is, the set value set by the fourth setter 34. Therefore, it is possible to prevent as much as possible the drive load on the clamping and conveying device section 6 from increasing to the point where the motor drive is stopped.

In summary, the combine harvester according to the present invention automatically turns off the power supply circuit of the electric motor for handling depth adjustment when the detected current value in the electric motor exceeds the set value for a set time, and also turns off the power supply for the set time. It is characterized by a safety mechanism that automatically restores the circuit to the on state if the circuit continues to be cut off.

In other words, if an overcurrent exceeding a set value occurs in the power supply circuit for a set time due to an increase in the rotational load of the motor, the power supply is automatically turned off, thereby preventing motor burnout due to an abnormal increase in drive load. It is now possible to prevent sticking. Moreover, in the case of a safety mechanism that cuts off the power supply circuit based on current detection, the safety mechanism that is interposed in the rotational power transmission system of the motor, such as a clutch that cuts off transmission when a transmission load exceeding a set value occurs, Since the structure is simpler than that, it is advantageous in terms of cost and production.

In particular, while preventing the motor from burning out as described above, if the power supply circuit remains off for a set period of time, it is automatically restored to the on state, so that the following effects can be obtained. In other words, even if the drive resistance required to adjust the handling depth increases abnormally due to the large amount of grain culms being transported, the motor is adjusted in anticipation that this resistance may gradually decrease as the grain continues to be transported. Since the drive stop is automatically restored, it is possible to minimize the amount of unhandled grain due to poor handling depth adjustment, for example, and it is possible to adjust the threshing load to an appropriate level before the threshing load increases abnormally, for example. In other words, there is an effect that the work can be carried out efficiently by minimizing the interruption time while preventing the motor from burning out.

Note that although reference numerals are written in the claims section of the utility model registration for convenience of comparison with the drawings, the present invention is not limited to the structure of the attached drawings by such entry.

[Brief explanation of the drawing]

The drawings show an embodiment of the combine harvester according to the present invention; FIG. 1 is a partial side view, FIG. 2 is a block diagram of the handling depth control mechanism, and FIG. 3 is a block diagram of the safety mechanism. 20...safety mechanism, 27...notification mechanism, 36...
...Reduction mechanism, M...Motor.

Claims (1)

[Claims for Utility Model Registration] 1. Automatically cut off the power supply circuit of the electric motor M for handling depth adjustment when the current detected value therein exceeds the set value for a set time, and A combine harvester characterized by being provided with a safety mechanism 20 that automatically restores the power circuit to the ON state if the power circuit continues to be OFF. 2. The combine harvester according to claim 1, characterized in that the combine harvester is provided with a mechanism 27 that notifies that the safety mechanism 20 is in the cut state. 3. Utility model registration claims 1 and 2, characterized in that a mechanism 31 is provided which is linked to the safety mechanism 20 and automatically stops the aircraft traveling only while the safety mechanism 20 is in the off state. A combine harvester as described in any of the above. 4. According to claim 3 of the utility model registration claim, there is provided a mechanism 36 that automatically decelerates the movement of the aircraft when the detected current value of the power supply circuit becomes equal to or higher than another set value that is less than or equal to the set value. Combine as described.